Whilst one might not agree with all the coalition's policies (& I certainly don't).... Nonetheless what the current coalition have proven is that a coalition government can govern in the UK. In that they are running the country (setting budgets, getting legislation through parliament etc, etc).
Sure there are cock-ups but then so there are in any Government.
I dont believe this has ever happened before in the UK certainly in the last century? whenever coalitions were tried in the post war years they were a total failure, and hence coalitions have such a bad reputation in this country for their inability to govern?
Indeed if coalitions are pretty much the norm in many countries in Europe, why are they such a dirty word here? Indeed coalition politics in Germany (which is not exactly struggling) are largely as a result of a political system we (UK&US) foisted on them after WW2...
I actually think that now we have seen that coaltions can actually Govern that might be good for democracy, since people might be more likely to vote away from the big 2 parties & enable a slightly more pluralistic & representative democracy. Sure the lib dems are unpopular at the moment, but that will change. Whilst I'm not a lib dem myself, the partisan mudslinging does get a bit tedious.
Maybe I'm being a little idealistic here, but UK politics are changing, certainly minority parties are getting a larger share of the vote, Labour & Tories can be less sure of majorities in the future.